Chemical energy is released or absorbed from reactions in various forms. The mosteasily measurable form of energy comes in the form of heat, or enthalpy for isobaricprocesses. The enthalpy of a reaction can be calculated from the heats of formation /formation enthalpies of the substances involved in the reaction:AHAH; (products) - AH; (reactants)Part ACalculate the standard enthalpy change for the reactionUse the following data:ΔΗ(kJ/mol)-225-393209SubstanceABCDExpress your answer to three significant figures and include the appropriate units.▸ View Available Hint(s)ΔΗixn = 278Submit✓ CorrectPart B-491Previous AnswersμAValuekJmolFor the reaction given in Part A, how much heat is absorbed when 3.30 mol of A reacts?Express your answer to three significant figures and include the appropriate units.▸ View Available Hint(s)A13 ?Units2A + B 2C+2D

Given:∆fH°(A) = -225kJ/mol∆fH°(B) = -393 kJ/mol∆fH°(C) = 209 kJ/mol∆fH°(D) = -491 kJ/mol

Chemical energy is released or absorbed from reactions in various forms. The most easily measurable form of energy comes in the form of heat, or enthalpy for isobaric processes. The enthalpy of a reaction can be calculated from the heats of formation/ formation enthalpies of the substances involved in the reaction: AH AH (products) - AH; (reactants) Part A Calculate the standard enthalpy change for the reaction Use the following data: ΔΗ; Substance (kJ/mol) A B C D ΔΗix = 279 Express your answer to three significant figures and include the appropriate units. ▸ View Available Hint(s) Submit ✓ Correct Part B -225 -393 209 -491 μA Value Previous Answers k.J mol For the reaction given in Part A, how much heat is absorbed when 3.30 mol of A reacts? Express your answer to three significant figures and include the appropriate units. View Available Hint(s) 13 ? Units 2A+B=2C+2D

Chemical energy is released or absorbed from reactions in various forms. The most easily measurable form of energy comes in the form of heat, or enthalpy for isobaric processes. The enthalpy of a reaction can be calculated from the heats of formation/ formation enthalpies of the substances involved in the reaction: AH AH (products) - AH; (reactants) Part A Calculate the standard enthalpy change for the reaction Use the following data: ΔΗ; Substance (kJ/mol) A B C D ΔΗix = 279 Express your answer to three significant figures and include the appropriate units. ▸ View Available Hint(s) Submit ✓ Correct Part B -225 -393 209 -491 μA Value Previous Answers k.J mol For the reaction given in Part A, how much heat is absorbed when 3.30 mol of A reacts? Express your answer to three significant figures and include the appropriate units. View Available Hint(s) 13 ? Units 2A+B=2C+2D

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

See similar textbooks

Related questions

Q: Measurements show that the energy of a mixture of gaseous reactants decreases by 285. kJ during a…

A: Given, The change in energy is given by = ∆E = -285.5 kJ ( decreased) The work done on the mixture…

Q: Indicate the sign of the enthalpy change, ΔH, in the following processes carried out under…

A: When a reaction takes place, various bonds are formed and broken. Due to this, the energy of…

Q: Sign conventions for Heat (g) and Work (w) : The change in internal energy of a system can be…

Q: When 4.00 g of sodium hydrogen carbonate reacts completely with 90.0 ml of acetic acid, the…

A: The molar enthalpy of a reaction indicates the enthalpy change produced as a result of the formation…

Q: How much heat is required to raise the temperature of 235.42 g of water from 22.5 °C to 96.2 °C?…

Q: Measurements show that the enthalpy of a mixture of gaseous reactants decreases by 331. kJ during a…

A: Given decrease in enthalpy = 331 kJ work done on the mixture =105 kJ

Q: Express the enthalpy of the following reaction, AH3, in terms of AH1. 12 Al(s) + 90,(g)→ 6 Al,O,(s)…

Q: LOSCIOU In carbon combustion, the oxidation of solid carbon to produce carbon monoxide is…

Q: When 23.6 g of calcium chloride, CaCl, was dissolved in water in a constant-pressure calorimeter,…

A: The mass of calcium chloride is = 23.6 g Increase in the temperature of the calorimeter is =…

Q: Measurements show that the energy of a mixture of gaseous reactants decreases by 126. kJ during a…

A: Solution Given that Enthalpy is decreased = 126 kj Work…

Q: The energy lost or gained by a chemical reaction is measured by the reaction's enthalpy change. The…

Q: Calculate the standard enthalpy change

Q: Consider the reaction Naz CO3 (s)→Na2O(s) + CO2(g) with enthalpy of reaction AHrxn° = 321.5kJ/mol…

A: Enthalpy change is the amount of heat evolved or absorbed in a reaction carried out at constant…

Q: The chemical equation that represents the combustion of methane is CH4(9) +20₂(9) - CO₂(g) + 2H₂O(g)…

A: The energy difference between the enthalpy of the products and enthalpy of the reactants is called…

Q: Chemical energy is released or absorbed from reactions in various forms. The most easily measurable…

Q: Measurements show that the energy of a mixture of gaseous reactants decreases by 177. kJ during a…

Q: Measurements show that the energy of a mixture of gaseous reactants increases by 231. kJ during a…

Q: Given the following reaction enthalpies: P,(s) + 6 Cl,(g) → 4 PCI,(g) =-1225.6moi → PO,(s) → PCI,(g)…

Q: Measurements show that the energy of a mixture of gaseous reactants decreases by 308.kJ during a…

Q: A total of 2.00 mol of a compound is allowed to react with water in a foam coffee cup and the…

Q: For the chemical reaction Ca (s) + ½ O, (g) → CaO (s) AH° = -635 kJ/mol. What is the enthalpy for…

A: The given reaction is, 2CaO(s) ---> 2Ca(s) + O2(g) The chemical reaction given is, 1) Ca(s) +…

Q: Prepare 100 mL of a 10mM tris solution using a 1M tris stock (include the amount of water in your…

A: In case of dilution of any electrolyte, the number of moles (or millimoles) remains unchanged. i.e,…

Q: When 0.670 g of sodium metal is added to an excess of hydrochloric acid, 6970 J of heat are…

A: moles= mass/molar mass 2 Na(s) + 2 HCl(aq)-----> 2 NaCl(aq) + H2(g) Or Na(s) +…

Q: Part A Ozone, Os, is destroyed when CIO levels are high. CIO is likely formed from the decomposition…

A: We are given the standard enthalpy of formation of some molecules we have to find the standard…

Q: A scientist measures the standard enthalpy change for the following reaction to be 6.7 kJ : CO(g) +…

Q: Measurements show that the energy of a mixture of gaseous reactants decreases by 206. kJ during a…

A: The work done on the gas mixture is =-145. kJ The change in the energy of the gas mixture is = 206.…

Q: Measurements show that the energy of a mixture of gaseous reactants increases by 396. kJ during a…

Q: When chemical A and chemical B are mixed together, and endothermic reaction below occurs: 4A(aq) +…

A: Thus, Moles of C is produced: 0.0255 mol

Q: Ethylene glycol, HOCH2 CH,OH, is used as antifreeze. It is produced from ethylene oxide, C2H4O, by…

Question

Chemical energy is released or absorbed from reactions in various forms. The most
easily measurable form of energy comes in the form of heat, or enthalpy for isobaric
processes. The enthalpy of a reaction can be calculated from the heats of formation /
formation enthalpies of the substances involved in the reaction:
AHAH; (products) - AH; (reactants)
Part A
Calculate the standard enthalpy change for the reaction
Use the following data:
ΔΗ
(kJ/mol)
-225
-393
209
Substance
A
B
C
D
Express your answer to three significant figures and include the appropriate units.
▸ View Available Hint(s)
ΔΗixn = 278
Submit
✓ Correct
Part B
-491
Previous Answers
μA
Value
kJ
mol
For the reaction given in Part A, how much heat is absorbed when 3.30 mol of A reacts?
Express your answer to three significant figures and include the appropriate units.
▸ View Available Hint(s)
A
13 ?
Units
2A + B 2C+2D

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

This is a popular solution!

SEE SOLUTION Check out a sample Q&A here

Step 1: Given standard enthalpies of formation data

VIEW

Step 2: Calculation for part a

VIEW

Step 3: Calculations for part b

VIEW

Solution

VIEW

Trending now

This is a popular solution!

Step by step

Solved in 4 steps with 1 images

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, chemistry and related others by exploring similar questions and additional content below.

Similar questions

Calculate Unit cost
(b) An aqueous solution of acetic acid can be prepared by the reaction of ethanol with oxygen : CH3CH2OH (1) + O2 (g) –→ CH3COOH (1) + H2O (1) Write thermochemical equations for enthalpy of formation of the given compounds and calculate AH for the reaction, given the following data. Enthalpy of formation, AHf (kJmol") -277.8 Compound CH;CH2OH (1) CH3COOH (I) H2O (1) -485.0 -286.0
Calculate the standard enthalpy of formation for C3H6O (l) from its combustion using the following data: Enthalpy of this combustion is -1793 kJ ( you must write a balanced reaction first).
Measurements show that the energy of a mixture of gaseous reactants increases by 178. kJ during a certain chemical reaction, which is carried out at a constant pressure. Furthermore, by carefully monitoring the volume change it is determined that - 143. kJ of work is done on the mixture during the reaction. Calculate the change in enthalpy of the gas mixture | kJ during the reaction. Round your answer to 3 significant digits. x10 ? exothermic Is the reaction exothermic or endothermic? endothermic
When 0.215 g of sodium metal is added to an excess of hydrochloric acid, 2230 J of heat are produced. What is the enthalpy of the reaction as written? 2 Na(s) + 2 HC1(aq) 2 NaCI(aq) + H, (g) Enthalpy of reaction: kJ
The standard heat of formation, AH;, is defined as the enthalpy change for the formation of one mole of Part B substance from its constituent elements in their standard states. Thus, elements in their standard states have AH: = 0. Heat of formation values can be used The combustion of ethene, C2H4, occurs via the reaction to calculate the enthalpy change of any reaction. C2H4 (g) + 302 (g)→2CO2(g) + 2H20(g) Consider, for example, the reaction with heat of formation values given by the following table: 2NΟ (5) + Ο, (s) 2ΝO, (g) ΔΗρ (kJ/mol) Substance with heat of formation values given by the following table: C2H4 (g) 52.47 CO2 (g) -393.5 Substance (kJ/mol) H2O(g) -241.8 NO(g) 90.2 Calculate the enthalpy for the combustion of ethene. 02 (g) Express your answer to four significant figures and include the appropriate units. NO2(g) 33.2 • View Available Hint(s) Then the heat of formation for the overall reaction is ΔΗ ΔΗ (products) -ΔΗ; (reactants ) [2(90.2) + 0] HA ? 2(33.2) -114 kJ/mol…